I added import core.stdc; Compiles with or without it here, though, so I can't say if it helped. However; does that even make sense? Shouldn't you have to import a particular module instead of just core.stdc?
I add import core.stdc.stdlib; but core.stdc.stdlib.system(...) conflict with std.process.system(...); and there have other compiler issues with head version of dmd, druntime and phobos, because phobos has minor changes. I have to leave a week right now and no time to fix all those issues. Sorry!
